| Label | Dataset | Type | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | aperture card |
Carriers |
Authority | ha | |
| 2. | microfilm cassette |
Carriers |
Authority | hc | |
| 3. | other microform carrier |
Carriers |
Authority | hz | |
| 4. | microfiche |
Carriers |
Authority | he | |
| 5. | microopaque |
Carriers |
Authority | hg | |
| 6. | microfilm cartridge |
Carriers |
Authority | hb | |
| 7. | microfilm reel |
Carriers |
Authority | hd | |
| 8. | microfiche cassette |
Carriers |
Authority | hf | |
| 9. | microfilm slip |
Carriers |
Authority | hh | |
| 10. | microfilm roll |
Carriers |
Authority | hj | |
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